Portsmouth Rhode Island Weather Almanac
Tuesday, April 27, 2021
Partly Cloudy, Light Sprinkles Late Morning, Seasonal Temperatures
Climate Normal Period Climate Record Period  
1991- 2020   1893 - 2021  
    April 27, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Temperature   61   43   59   +2   81   in 1915   43   in 2020  
Minimum Temperature   40   38   43   -3   53   in 2011   33   in 1987  
Average Temperature   51   41   51   +0   66   in 1935   40   in 1898  
 Month Avg Max Temperature   56.4   51.7   54.7   +1.8   61.1   in 1976   47.9   in 1907  
Month Avg Min Temperature   39.0   37.4   39.0   +0.1   43.3   in 2010   33.3   in 1943  
Month Average Temperature   48.0   44.9   47.1   +0.9   52.0   in 2010   41.4   in 1907  
HDD   14   24   14   +0   25   in 1898   0   in 1935  
Month HDD   459   544   483   -24   637   in 1907   352   in 2010  
Season HDD   4779   4769   5133   -354   6212   in 1904   4238   in 2012  
CDD   0   0   0   +0   1   in 1935   0   in    
Month CDD   0   0   0   +0   13   in 1976   0   in    
Year CDD   0   0   0   +0   13   in 1976   0   in    
Maximum Dew Point   38   41   47   -9   60   in 2011   27   in 1966  
Minimum Dew Point   28   36   34   -6   53   in 2011   6   in 1966  
Average  Dew Point   33   39   40   -7   57   in 2011   17   in 1966  
 Month Avg Max Dew Point   42.2   41.4   42.4   -0.2   47.3   in 2019   33.7   in 1965  
Month Avg Min Dew Point   29.7   28.6   29.2   +0.5   36.6   in 2010   20.1   in 1982  
Month Average Dew Point   36.0   35.0   35.8   +0.2   41.6   in 2010   28.5   in 1965  
Precipitation   T   .18   .14   .00   1.77   in 1937            
One Hour   T   .04           .58   in 1982            
Hourly Rate   .00   .05           3.79   in 2007            
Month Precipitation   3.21   5.07   3.85   -.64   11.92   in 1983   .47   in 1963  
Year Precipitation   11.63   15.83   15.31   -3.68   31.19   in 1983   7.51   in 1985  
Snow   0.0   0.0   0.0   +0.0   0.0   in              
Snow Depth   0   0           0   in              
Month Snow   T   T   0.5   -0.5   9.6   in 1996   0.0   in 2019  
Season Snow   27.7   12.9   33.5   -5.8   84.1   in 1996   5.0   in 1998  
    April 27, 2021     Record Record
Observed Daily Data   2021   2020   Norm   Depart   Highest Lowest
Maximum Humidity   68%   94%   89%   -21%   100%   in 2019   53%   in 1981  
Minimum Humidity   30%   86%   52%   -22%   96%   in 1973   24%   in 1966  
Average Humidity   49%   90%   71%   -22%   98%   in 1973   41%   in 1966  
Maximum Barometer   30.08   29.95   30.05   +00.03   30.60   in 1966   29.45   in 2010  
Minimum Barometer   29.92   29.68   29.81   +00.11   30.32   in 2013   29.20   in 2019  
Average Barometer   30.00   29.82   29.93   +00.07   30.41   in 1958   29.33   in 2010  
Average Wind   7.0   14.5   7.1   -0.1   17.7   in 2020   2.9   in 2008  
Wind Direction   NW   N   N       N         E        
High Wind Gust   27   32   24   +3   47   in 1947   11   in 2008  
Gust Direction   SW   N   NNW       SW         ESE        
High Heat Index                                      
Wind Chill   37   30   37   -0             23   in 1993  
Maximum Water Temp   48.4   40.8   49.3   -0.9   56.5   in 2007   40.8   in 2020  
Minimum Water Temp   46.2   39.7   46.5   -0.3   52.0   in 2012   39.7   in 2020  
Average Water Temp   47.3   40.3   47.9   -0.6   53.1   in 2012   40.3   in 2020  
Sunrise/ AM Twilight   5:45:35 AM   5:15:46 AM            
Sunset / PM Twilight   7:39:48 PM   8:09:37 PM            
Length Of Day   13:52:20                          
Special Conditions   None                              
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